Measure the length and width of the wall. Write down these measurements.
Purchase a gauzey, diaphanous piece of fabric and cut it to the width of the wall and a length that is twice as long as the length measurement you wrote down.
Install screw-in 1-inch cup hooks along each far right and left edge of the wall. Start at the top, screwing in a hook every 12 inches.
Lay your fabric facedown. Thread a needle with nylon thread in a color that matches your canopy. Sew a 1-inch-wide gold or metal ring at the top right and left corners of your fabric with a few tight stitches. Continue to sew metal rings on either edge of the fabric, spacing them out every 18 inches.
Attach your canopy to the wall by sliding the rings onto the hooks. Your canopy will billow with natural folds and swag.